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. 2019 Nov 21;24(23):4245. doi: 10.3390/molecules24234245

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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(a) Weakly bonded layers in the XN−CF cocrystals; (b) the in-plane of the XN layer hydrogen bonds. It can be seen that one XN molecule (green) is surrounded by three caffeine moieties (yellow).

(a) Weakly bonded layers in the XN−CF cocrystals; (b) the in-plane of the XN layer hydrogen bonds. It can be seen that one XN molecule (green) is surrounded by three caffeine moieties (yellow).